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Edition:Final report.
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Abstract:The accelerated bridge paint (AB-Paint) program evaluated a new Sherwin-Williams two-coat,
fast-curing paint system. The system is comprised of an organic zinc-rich primer (SW Corothane I
Galvapac One-Pack Zinc-Rich Primer B65 G11) and a polyurea-modified high-build urethane
finish coat (SW Fast Clad Urethane B65950 Series). The two-coat system would be a replacement
or alternative for the current three-coat paint system (i.e., zinc-rich primer/epoxy intermediate/
urethane finish) approved in Bulletin 15. The accelerated bridge painting technology could
provide a material cost benefit by applying only two coats instead of three. There was the potential
that the blasting, primer and topcoat could be placed during a work shift, which would result in
reduced labor cost. There would also be benefit to the traveling public with shorter traffic
interruption and inconvenience with the accelerated technology.
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